If you're having trouble staying motivated to achieve your goals—whether it's exercising every day or keeping your email inbox empty—web service Beeminder will help you track your progress, and (optionally) keep you motivated you by charging you whenever you fall behind.

When you sign up for Beeminder, you can create your own goal or integrate it with a service like RunKeeper, our favorite exercise tool, Withings, a great gadget for keeping yourself in shape, or Gmail Zero, which tracks the number of messages in your Gmail inbox. Essentially, you create a goal and a timeframe for reaching that goal. Beeminder will create a plan that helps you get there little by little, letting you track your progress as you go. If you ever fall behind, Beeminder will send you a notification, and if you stay behind for more than a day, you can set it to charge your credit card a predetermined amount of money. It'll not only keep you motivated to stick to your plan, but also support the service in the process. Hit the link to check it out.